Simple ID card building application using flutter

import 'package:flutter/material.dart';

void main() => runApp(MaterialApp(
  home: NinjaCard(),
));

class NinjaCard extends StatefulWidget {
  @override
  _NinjaCardState createState() => _NinjaCardState();
}

class _NinjaCardState extends State<NinjaCard> {
  int level = 0;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.grey[900],
      appBar: AppBar(
        title: Text('Ninja ID Card'),
        centerTitle: true,
        backgroundColor: Colors.grey[850],
        elevation: 0.0,
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: (){
          setState(() {
            level += 1;
          });
        },
        child: Icon(Icons.add),
        backgroundColor: Colors.grey[500],
      ),
      body: Padding(
        padding: EdgeInsets.fromLTRB(30.0, 40, 40.0, 0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            Center(
              child: CircleAvatar(
                backgroundImage: AssetImage('assets/money.PNG'),
                radius: 40,
              ),
            ),
            Divider(
              height: 60,
              color: Colors.blueGrey,
            ),
            Text(
              'SREENIVAS',
              style: TextStyle(
                color: Colors.grey,
                letterSpacing: 2,
              ),
            ),
            SizedBox(height: 10,),
            Text(
              '$level',
              style: TextStyle(
                color: Colors.amberAccent[200],
                letterSpacing: 2,
                fontSize: 28,
                fontWeight: FontWeight.bold,
              ),
            ),
            SizedBox(height: 10,),
            Text(
              'Yalamuri',
              style: TextStyle(
                color: Colors.green,
                letterSpacing: 2,
                fontSize: 28,
                fontWeight: FontWeight.w100,
              ),
            ),
            SizedBox(height: 10,),
            Row(
              children: <Widget>[
                Icon(
                  Icons.email,
                  color: Colors.red,
                ),
                SizedBox(width: 10,),
                Text(
                  'sreenvas9830@gmail.com',
                  style: TextStyle(
                    color: Colors.indigoAccent,
                    fontSize: 20,
                    letterSpacing: 1,
                  )
                )

              ],
            )
          ],
        )
      ),
    );
  }
}